Lewis Diagrams for Compound FormationThe formation of many common compounds can be visualized with the use of Lewis symbols and Lewis diagrams. In a Lewis symbol, the inner closed shells of electrons can be considered as included in chemical symbol for the element, and the outer shell or valence electrons are represented by dots. The dots are placed in four groups of one or two electrons each, with 8 electrons representing a closed shell or noble gas configuration. Lewis diagrams are useful for visualizing both ionic and covalent bonds. In the idealized ionic bond, one atom gives up an electron to the other, forming positive and negative ions.
In the idealized covalent bond, two atoms share a pair of electrons, closing the shell for each of them.
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Index Chemistry concepts Reference Shipman, Wilson, Todd Ch 12 | ||||||
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Lewis Diagrams for Multiple BondsLewis symbols and Lewis diagrams can be used to describe multiple bonds, but further information must be supplied to account for the three dimensional geometry of the resulting molecules. For multiple single bonds, the procedure is similar that for a single bond.
The Lewis diagrams can also help visualize double and triple bonds.
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Index Chemistry concepts Reference Shipman, Wilson, Todd Ch 12 | |||
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